Expandable backpack



FIG. 1 is a front perspective view of an expandable backpack showing ournew design;

FIG. 2 is a front perspective view thereof showing an expansion sectionopened;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a front view thereof; and,

FIG. 8 is a rear view thereof.

We claim the design for an expandable backpack, as shown. 